EFFECT OF CURLING ON AS-CONSTRUCTED AND EARLY LIFE SMOOTHNESS OF PCC PAVEMENTS

This study investigates the effect of curling on as-constructed and early life smoothness of Portland cement concrete pavements (PCCP) in Kansas. Six test sections on three newly built PCCP projects on I-70 and I-135 were selected. Material properties of different layers were collected. As-constructed and periodic profile measurements were taken by a South Dakota-type profiler on each wheel path of both driving and passing lanes. International Roughness Index (IRI) was used as the smoothness statistic. A digital method was developed to separate curling from the measured profiles using Fast Fourier Transform. IRI values were calculated for the curled profile as well as for the profiles without curling. The contribution of curling to the measured smoothness was found to be significant. A set of models was developed to describe curling and early life smoothness in terms of different construction, geometric and climatic variables. The as-constructed and early life curling were found to be significantly affected by the PCCP slab thickness, concrete strength, vertical grade and the stabilized base stiffness. IRI values calculated from profiles without curling are affected by compressive strengths of concrete and bound drainable base layers, change in the plasticity index values of subgrade due to soil treatment and vertical grade of the road. Higher IRI would result from stronger concrete and stiffer base. Traffic did not appear to have any effect on curling.

Language

  • English

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 10p
  • Monograph Title: MID-CONTINENT TRANSPORTATION RESEARCH SYMPOSIUM (AMES, IOWA, AUGUST 21-22, 2003). PROCEEDINGS

Subject/Index Terms

Filing Info

  • Accession Number: 00963385
  • Record Type: Publication
  • ISBN: 0965231062
  • Files: TRIS
  • Created Date: Oct 1 2003 12:00AM